Automatic air-controlling device.



F. E. CROTTO.

AUTOMATIC AIR CONTROLLING DEVICE.

APPLICATION FILED SEPT. 4, 1914.

1,17 ,433, Patented Feb.22,1916.

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F. E. CROTTO.

AUTOMATlC AIR CONTROLLING DEVICE.

APPLICATION FILED SEPT-4, 1914.

Patented Feb. 22, 1916.

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WITNESSES: 0H3. d

A TTOR/VEY THE COLUMBIA PLANODRAPH c0., WASHINGTON, D. cv

1 UNITED STATES PATENT oFFIou'.

FRANK 0301122120, or DALLAS, TEXAS, ASSIGNOR or ONE-HALFQTOI SAMUEL rnEsnMAN, or DALLAS, TEXAS- v AUTOMATIC AiR-CONTROLLING DEVICE.

To all whom it may concern Be it known that I, FRANK E. CRo'r'ro, of Dallas, Texas, residing at 1819 Bennett street, have invented certain new and useful Improvements in Automatic Air-Controlling Devices, of which the following is a specification. I v

This invention as specified relates to new and useful improvements in automatic air controlling device'and has as its primary object the production of a machine which will furnish an air supply at a constant and unvarying pressure.

An object of the invention is to provide an automatic air controlling device embodying a balanced and floating air bell, said element being contained and guided within a liquid shell and hermetically sealed therein.

Another object is to provide an automatic air controlling device embodying a high and low pressure reservoir and means for controlling the passage of the air from the high pressure reservoir to the low pressure reservoir. 1

Still another object is to provide a machine positively and automatically controlled, in the maintenance of its air supply, through the medium of a liquid balance control.

Finally with these and other objects in view the invention has relation to a certain arrangement and combinationof parts, an example of which is described in this specification, illustrated in the accompanying drawings and pointed out in'the appended claims.

Figure 1 is a vertical longitudinal sectional view of the assembled machine. Fig. 2 is a partial view of the upper portion of a float chamber and correlated elements which are embodied in the invention. Fig. 3 is a plan view of a certain actuating member embodied in the invention, the view being taken upon the section line A-.A of Fig. 1. Fig. 4 is a longitudinal sectional view of is; '{Iertical guide tube correlated with the air Referring now more in particular to the drawings, the numeral 1 designates an outer shell which is adapted to contain and house elements hereinafter mentioned. A high pressure storage reservoir 2 is contained within the shell 1. Said reservoir is centrall Specification of Letters Patent.

Patented Feb. 22, 1916".

Application filed September 4, 1914. Serial No. 860,179.

provided with a permanent and fixed guide tube 3, said guide tube having its upper extremity open. The. lower extremity of said guide tube has connection with an air discharge pipe 4 which, as may here be understood, isjadapted to convey to and fur nish a carbureter, (not shown) with which this compressor is adapted to associate, air

unvarying, and reliable pressure supply. The open annular space between the shell and reservoir 2 is filled with a non-volatile liquid, as illustrated. An air bell or low pressure reservoir 5 is contained within the 1 upper portion of'the shell. Said low pressure reservoir, as illustrated, has its lower portion open and immersed and hermetically sealed in the liquid above referred to. The

bell or reservoir 5 is-weighted as indicated by the numeral 6, which, as will beseen, subjects said reservoir to a sufiicient downward pressure for compressing the air within said reservoir to a suiiicient pressure for said guide tube which illustrates elements correlated 'therewithnot shown in Fig. 1. A tube 8 is carried within the guide tube 7 and sealed on its lower-extremity; said tube extends through the cap 9 of the guide and is provided with a cap 10. A pull rod 11 provided on its lower extremity with a head 12 is confined within the tube 8 and extends through a loose fitting hole in the cap 10 and provided with aslotted yoke 18 fixed to. its upper extremity. As later seen the correlated tubes are adapted to undergo a vertical displacement due to the rise and fall of the low pressure reservoir; such action will allow the pull rod to remain stationary While the tubes slowly travel therealong. Reference being had to the arrows in Fig. at it is clearly seen how the air may pass from the low pressure reservoir through the perforations of tube 7 downward into the gains tube 3 into the discharge pipe e without escaping to atmosphere where the pull rod 11 emerges to atmosphere; such is the function of the sealed tube 8.

An inverted pressure drum 14: is contained within the high pressure reservoir and communicates directly with a tube 15 which extends from the reservoir and extends vertically upward where it communicates with a float chamber 16. As illustrated the pressure drum, float chamber, and connecting pipe .15, contain a liquid, preferably a. non-volatile liquid such as used in the shell. The purpose of the liquids embodied in the machine is merely to. assist and facilitate the functions of the operation, and as permanency is desired a non evaporating liquid is employed. As seen the liquid in the two elements 14 and 16 stand at 1 unequal level, obviously a pressure is affecting the equilibrium of the liquid, a description of whichwill be later given.

A- float 17 is contained within the float chamber and buoyed upon the liquid surface; said float through the medium of its correlated elements is adapted to automatically govern the action and period of operation of the machine. A vertical rod 18 is fixed to the upper end of the float and. extends through a fiber insulating cover cap 19 of the float chamber. It is hereto be understood that the-float member is employed to open and close an electric circuit. said circuit in turn mechanically maintaining a pressure within the reservoir 2. Tothis end a pair of adjacent mercury cups 20 are disposed upon the base or cover 19. A circuit line C is here cut and the terminal of each connected to the mercury cups and conducted to the mercury therein. Said circuit is adapted to be led to a motor (not shown) employed in connection with the machine. A bracket 21 insulated from and fixed to the rod 18 carries a pair of depending dip rods 22 adapted to be immersed in the mercury cups thereby closing the circuit C. A support bracket 23 is fixed to the fiberbase and pivotally carries an actuating member24 which lies in close'contact with therod 18 and between a pair of collars fixed to the rod. A coiled tension spring 26 is "fixed to the support and actuating member and adapted to exert a pull upon the actuating member, the purpose of which will later develop in the description of the operation of the machine.

It will here be understood that a moder ately high pressure will be maintained in the reservoir 2 and to this end and in this instance a centrifugal blower B througha connecting pipe 27 is employed. to maintain a pressure supply to the reservoir 2. A check valve 28 is embodied in the line 27 to check and prevent the backing up of the pressure through said pipe 27.

It will be necessarytofurnish means forcontrolling the admission of the pressure from the reservoir 2.130 the low pressure reservoir 5. To thisend a pressure control linei29 is employed, said line has embodied therein automatic control means directly correlated with the pull rod of the low pressure reservoir. The action of the reservoir will then exercise a controlling relation over the passage of the air through the line 29. The line 29 opens directly into the reservoir 2,

extends therefrom where it opens into a check valve 30 and liquid control. valve 31., said control-valve consists. of a pair of parallel tubes 31 associated with a connecting chamber 32 which forms a substantial U1;

and beneath the low pressure reservoir.

A valve trip member 3%. in the form of'a Ushaped rod, is contained within the control valve and has one'of its extremities nor mally in contact or just beneath the lower side of the check of valve 30. The-other extremity of'the valve trip member extends r upwardly through the control valve and is provlded with a slotted yoke 35 similar-t0 the one 13 previously mentioned. it lever .36-

having its extremities looselyconfined within the slot-ted yokes l3 and is pivoted at *37 upon the shell 1 and: establishes a movable and controlling ,relation ofthe pull rod 11 over the trip member 34:. A support bracket 38 having similar-functions to the one 23 is substantiallycarried by the uppermost ex-v tremity of thecontrol valve. Said bracket is provided with a pivoted actuating memiher 39 and pull spring 4-0. The actuating.

member 39 is confined. between a pair, f

collars 89 fixed to the rod The spring 40.

is attached to the member 39 and has its other extremity provided with a threaded member 41 and thumb nut 42, such an arrangement gives 21115 adjustable means for varying the tension of the spring.

An assembly has been given of the con trolling element embodied in the pressure control line; the dlrection of the pressure:

flow, through said line 29, will now be clearly traced. I The arrows indicate the pressure leaving the reservoir 2 through the line 29,

at the proper time of flow the check valve 30. will be tripped allowing the pressure topass downward against the liquid in the control valve. The liquid will immediately divert the pressureinto the'line 29 which connects wlth theT member, the'hue 29 then carries the pressure directly to the reservoir 5. The

function ,of%theoil control valve is then clearly to furnish a means to allow the valve trip member a free and unrestricted movement within the control valve and divert the pressure into the proper channel without the employment of stuffing boxes and the like.

.A description of the operation will now be given, and beginning-with the machine in its normal and poised operating position. A moderately high pressure has been set up in the reservoir 5 through the medium of the centrifugal blower. Said pressure is acting directly downward upon the liquid contained in the pressure drum 14 which forces the liquid in the float chamber upward breaking the circuit C and stopping the operation of the blower. When the float began to rise and draw the diprods 22 from the mercury cups the spring 26 executed a quick and positive upward jerk of the correlated elements which prevented the arcing and hesitancy of the break in the circuit. The air bell or low pressure reservoir 5 is feeding its pressure through the various channels, as previously described, into the discharge pipe 4:. The weighted reservoir 5 will slowly descend keeping up the flow at a constant pressure. When the bell descends to its lower-most position the pull rod 11 through its head 12 will exert a downward pull on the lever 36 which will raise the trip rod in the control valve.

thereby opening the valve 30. Here the pull spring &0 performs substantially the same functions as the spring 26, that is, the valve 30 is equally lifted when the action starts. The air pressure flow then takes the direction as described, exhausting the high pressure from reservoir 2 to reservoir 5. This immediately causes the reservoir 5 to slowly return to its normally upward limited position. At this stage of the operation (the pressure being exhausted from the reservoir 2) the liquid in the pressure drum and float chamber will seek their level which allows the float to drop; this immediately closes the circuit which causes the blower to again perform its function of raising the pressure in the reservoir 2. hen the pressure is raised sufficiently high in the reservoir 5 the float 17 will open the circuit thereby stopping the motor till the traveling air bell again effects the controlling elements in the manner described which will again set the machine in operation repeating the cycle of action substantially, as illustrated and described.

The invention is presented as including all such modifications and changes as may properly come within the scope of the following claims.

Claims:

1. In an automatic air controlling device, the combination of an outer shell, a high pressure reservoir contained within said shell, a low pressure reservoir contained within said shell, a guide tube carried within the high pressure reservoir, a perforated guide tube carried by the low pressure reservoir. and having its lower exti-emity confined within the first guide tube pressure reservoir.

2, In .an automatic air controlling device, the combination of an outer shell, a high pressure reservoir contained within said shell, a low pressure reservoir contained within said shell, a perforated guide tube correlated with the low pressure reservoir, a sealed tube contained within the perforated tube, a pull rod slidably confined within the sealed tube, a guide tube carried within the high pressure reservoir, the perforated guide tube of the low pressure reservoir slidably confined within the guide tube of the high pressure reservoir and means provided for controlling the air passage from the high pressure to the low pressure reservoir.

3. In an automatic air controlling device, the combination of an outer shell, a high pressure reservoir contained within said shell, an annular liquid receptacle formed between two said elements recited, guide tubewithin the reservoir, a discharge line connected with the guide tube, a floating air bell poised above thereservoir and hav- 3 ing its lower open extremity hermetically sealed in the liquid contained in the annular spaceand a control valve.

4. In an automatic air controlling device,

the combination of an outer shell, a high pressure reservoir contained within the shell, an annular liquid receptacle formed between two said elements recited, a guide tube within the reservoir, a discharge line connected with the guide tube, a floating air bell'poised above the reservoir and having its lower open extremity hermetically sealed in the liquid contained in the annular space, a pressuredrum within the high pressure chamber, a float chamber correlated with the pressure drum and means correlated with float chamber for controlling the passage of air from the reservoir to the air bell.

5. In an automatic air controlling device, the combination of an outer shell, a high pressure reservoir contained within the shell, a low pressure reservoir contained in the shell, a pressure control line opening into the high pressure reservoir and communicating with the low pressure reservoir and a control valve embodied in the pres sure control line adapted to control the pressure reservoir contained Within the shell, a low pressure reservoir contained within the shell, a guide tube Within the high pressure reservoir, a perforated guide tube carried by the low pressure reservoir and confined. in the first guide tube, a pressure control line connecting the two reservoirs, a control valve embodie'drin the pressure controlline and means for controlling the flow of air through the saidcontrol line.

In an automatic air controlling device, the combination of an outer shell, a high pressure reservoir contained within the shell, a low pressure reservoir contained Within the shell, a guide tube Within the high pressure reservoir, a perforated guide tube carried by the ,l'OW pressure reservoir and confined in the first guide tube, a pressure control line connecting the reservoirs, a control *alve embodied in the pressure control line, and a valve trip member contained Within the control valve and adapted to control the How of pressure through the control. valve.

8. In an automatic air controlling device, the combination of an outer shell, .a high pressure reservoir contained Within the shell, a low pressure reservoir contained Within the shell, a guide-tube Within the high pressure reservoir, a perforated guide tube carried by the low pressure reservoir and confined in the first guide tube, a pres sure control line connecting the two reservoirs,,control valve embodied in the pressure control line, and a valve trip member containedwithin the control valve and a lever correlated. with the low pressure reservoir and the valve trip member.

9.'In an automatic air controlling device, the combination. of an outer shell, a high pressure reservoir contained Within said shell, a low pressure reservoir contained Within said shell, a pressure drum correlatedivith one of the reservoirs, a float cham ber connected with the pressure drum, a float within said chamber, a pressure con trol line connectingtlie tivo reservoirs, a control valve embodied in the pressure control line, a check valve embodied llltlle control valve, means for operating the check valve and an electrical circuit :breaker correlated with. the float chamber.

10. In an automatic air controlling de vice, the combination of an outer shell, a high pressure reservoir contained. Within said shell, a low pressure reservoir contained in said shell, a pressure drum correlated vrith one of the reservoirs, a float chamber connecting with said pressure drum, a float Within said chamber, a pressure control line connecting the tWo reservoirs, a control valve embodied in the pressure control line, a check valve embodied in the control valve, a valve trip member Within the control valve and adapted to trip the check valve, a liquor 'filler plug correlated with the valve, and means for establishinga controlling relation or the pressure drum'over the trip rod.

11. In an automaticair controlling device,

the combination of an outer shell, a high pressure reservoir contained in said Zshell, a low pressure reservoir contained in said shell, a pressure drum contained Within one. otthe reservoirs, a fioat chamber connect ng withith'e pressure drum, a float within; said chamber, a pressure control line connecting thetvvo reservoirs, a control 'alve embodied in the pressure control line, a check valve embodied in the control valve, a valve trip member Within the valve, a liquid fillr with one of the reservoirs, a fioat chamber:

connecting with pressure drum, a float contained in said chamben a vertical rod carried by the float, dip rodscarried by said vertical rod, mercury cups adapted to: receive the dip rods, and a pivoted actuating member adapted tolift the diprods.

13. In an automaticair controlling device, the combination of an outer shell, a high pressure reservoir contained Within said: shell, a low pressure reservoir contained Within said shell, a'pressure control tube connecting With the high pressure reservoir, a valve embodied in the pressure control tube, a filler plug provided in the controlvalve casing above the liquid level, and communicating with the low PI'GSSIII'GJ'GSBT- voir.

14-. In an automatic air controlling device, the combination of an outer shell, a high pressure reservoir contained in said shell, a 10W pressure reservoir contained in said shell, a pressure control line connecting the.

two reservoirs, a control valve embodied in 1 the pressure control line, liquid contained.

in the control valve, a check valve embodied in the control valve,an d a valve trip rodcon:

fined in the liquidof :the control valve and adapted to trip the said check valve.-

15. In an automatic air controlling device, the combination of an outer shell, a high pressure reservoir and low pressure reservoir contained in the shell, an annular space formed between the shell and one reservoir, the other reservoir having its loweropen end extending into said annular space, each reservoir provided with guide tubes,

nearest ling the passage of air from one reservoir In testimony whereof, I aflix my signature in the presence of two Witnesses.

FRANK E. oRoTTo.

to the other and a pull rod confined in one of the said guide tubes adapted to control the above recited air control means.

Witnesses:

SHEARON BONNER, J. C. LEDBETTER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

